Overall Green alert Tropical Cyclone for ZAZU-20
in Niue, Tonga
15 Dec 2020 00 UTC
click on to select bulletin time
Impact Single TC
Impact based on all weather systems in the area

Impact

Tropical Cyclone ZAZU-20 can have a low humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

Meteorological source GFS
Exposed countries Fiji, Tonga, Niue
Exposed population 240 thousand in Category 1 or higher
Maximum wind speed 112 km/h
Maximum storm surge 1.7 m (17 Dec 19:15 UTC)
Vulnerability High (Niue)

GDACS Score

GDACS alert score for Tropical Cyclones is 0.5 (GREEN Alert), 1.5 (ORANGE Alert), 2.5 (RED Alert)
For more info on GDACS alert score click here.
  Wind Storm surge Rainfall GDACS score
GFS Current 112 km/h 1.7 m 31 mm 0.5
GFS Overall 281 km/h 1.1 m 672 mm 1.5

Maximum winds, storm surge, rainfall (Current: over the next 72 h, Overall: entire TC track)

TOP

Wind

281 km/h

Up to 240 thousand can be affected by wind speeds of Tropical Storm strength or above



Wind exposed population - AoIs

Estimations based on the bulletin of 15 Dec 2020 00:00 UTC
CategoryCountryPopulation 
CAT. 2Fiji9,078 
CAT. 1Fiji234,172 
Tropical StormFiji, Tonga, Niue238,226
+
Fiji215,830 
Tonga21,206 
Niue1,190 

See TC classification SSHS


Wind Impact Timeline

people affected <=10000
10000< people affected <=100000
people affected >100000


Alert N° Date (UTC) Max Winds (km/h) Pop in Cat. 1 or higher TS Cat. 1 Cat. 2 Cat. 3 Cat. 4 Cat. 5 Countries
GREEN 1 13 Dec 2020 12:00 68 -
- - - - - Tonga
GREEN 2 13 Dec 2020 18:00 68 -
- - - - - Tonga
GREEN 3 14 Dec 2020 00:00 79 - - - - - - -
GREEN 4 14 Dec 2020 06:00 94 -
- - - - - Tonga
GREEN 5 14 Dec 2020 12:00 97 -
- - - - - Tonga
GREEN 6 14 Dec 2020 18:00 90 -
- - - - - Tonga
GREEN 7 15 Dec 2020 00:00 191 240 thousand
- - - Fiji, Tonga, Niue
Download:





Impact estimation for the next 72h
TOP

Rainfall





Rain exposed population - AoIs

Estimations based on the bulletin of 15 Dec 2020 00:00 UTC
LevelCountryPopulation 
250-500 mmFiji393,971 
100-250 mmSamoa, American Samoa, Tonga, Fiji, Niue603,355
+
American Samoa47,143 
Fiji357,336 
Samoa196,628 
Tonga1,058 
Niue1,190 
50-100 mmAmerican Samoa, Fiji, Wallis and Futuna, Tonga173,141
+
American Samoa6,426 
Fiji150,889 
Wallis and Futuna15,561 
Tonga265 

Rain Impact Timeline

people affected <=10000
10000< people affected <=100000
people affected >100000


Alert N° Date (UTC) Max Rainfall (mm) Pop >100mm or higher 50-100 100-250 250-500 500-750 750-1000 >1000 Countries
Blue 1 13 Dec 2020 12:00 19 Few people - - - - - - Tonga
Blue 2 13 Dec 2020 18:00 19 Few people - - - - - - Tonga
Blue 3 14 Dec 2020 00:00 22 - - - - - - -
Blue 4 14 Dec 2020 06:00 26 20 thousand - - - - - - Tonga
Blue 5 14 Dec 2020 12:00 27 20 thousand - - - - - - Tonga
Blue 6 14 Dec 2020 18:00 25 20 thousand - - - - - - Tonga
Blue 7 15 Dec 2020 00:00 681 1000 thousand
- - - American Samoa, Fiji, Wallis and Futuna, Samoa, Tonga, Niue




Impact estimation for the next 72h
TOP

StormSurge

1.7 m

The maximum Storm surge height is  1.7m in Lautoka, Fiji. This height is estimated for 17 Dec 2020 19:15 UTC .

The JRC has developed an experimental global storm surge model, which is run after each advisory issued by the regional tropical cyclone centres. The calculations are published about 20 minutes after a new advisory is detected by GDACS. The calculations identify the populated places affected by storm surge up to three days in advance, using the forecasted track. When forecasts change, the associated storm surge changes too and alert levels may go up or down. All links, data, statistics and maps refer to the latest available calculation. If the calculation for the last advisory is not completed, the latest available calculation is shown.

Storm Surge Exposed population - AoIs


Storm Surge Exposed locations

Calculation based on the bulletin of 15 Dec 2020 00:00 UTC
    
Alert Date (UTC) Name Country Storm surge height (m)
17 Dec 2020 19:15 Lautoka Fiji  1.7
17 Dec 2020 19:15 Nailanga Fiji  1.7
17 Dec 2020 19:15 Sorokoba Fiji  1.7
17 Dec 2020 19:15 Ba Fiji  1.7
17 Dec 2020 19:30 Natunuka Fiji  1.5
17 Dec 2020 19:30 Tavua Fiji  1.5
17 Dec 2020 18:15 Matacawalevu Fiji  1.3
17 Dec 2020 18:15 Sisili Fiji  1.3
17 Dec 2020 18:15 Nacula Fiji  1.3
17 Dec 2020 18:15 Navotua Fiji  1.3
17 Dec 2020 18:15 Tamusua Fiji  1.3
17 Dec 2020 18:15 Teci Fiji  1.3
17 Dec 2020 18:15 Mbukama Fiji  1.3
17 Dec 2020 18:15 Yasawairara Fiji  1.3
17 Dec 2020 21:30 Nalauwaki Fiji  1.2
17 Dec 2020 21:30 Soso Fiji  1.2
17 Dec 2020 21:30 Somosomo Fiji  1.2
17 Dec 2020 17:15 Matayalevu Fiji  1.1
17 Dec 2020 17:30 Namaka Fiji  1.1
17 Dec 2020 19:30 Rabulu Fiji  1.0
17 Dec 2020 19:30 Togowere Fiji  1.0
17 Dec 2020 18:15 Solevu Fiji  0.9
17 Dec 2020 18:15 Tavua Fiji  0.9
17 Dec 2020 19:15 Rakiraki Fiji  0.8
17 Dec 2020 19:15 Vaileka Fiji  0.8
17 Dec 2020 19:15 Nanukuloa Fiji  0.8
17 Dec 2020 19:15 Nasau Fiji  0.7
17 Dec 2020 18:15 Koroinasolo Fiji  0.6
17 Dec 2020 18:15 Savu Sau Fiji  0.6
17 Dec 2020 18:15 Navinggiri Fiji  0.6
17 Dec 2020 18:15 Yangganga Fiji  0.6
17 Dec 2020 18:15 Nawailevu Fiji  0.6
17 Dec 2020 19:15 Nayavutoka Fiji  0.6
17 Dec 2020 19:00 Ndenimanu Fiji  0.5
17 Dec 2020 18:30 Navindamu Fiji  0.5
17 Dec 2020 18:30 Nagumu Fiji  0.5
17 Dec 2020 18:15 Nasarowangga Fiji  0.5
17 Dec 2020 18:30 Ndalomo Fiji  0.5
17 Dec 2020 19:00 Lawaki Fiji  0.5
17 Dec 2020 19:00 Lodoni Fiji  0.5
17 Dec 2020 19:00 Naingani Fiji  0.5
17 Dec 2020 19:00 Korovou Fiji  0.5
17 Dec 2020 19:00 Ucunivanua Fiji  0.5
17 Dec 2020 19:00 Navuti Fiji  0.5
17 Dec 2020 19:00 Nasaga Fiji  0.5
17 Dec 2020 19:00 Rukuruku Fiji  0.5
17 Dec 2020 19:00 Lovoni Fiji  0.5
17 Dec 2020 19:00 Kasavu Fiji  0.4
17 Dec 2020 19:00 Nausori Fiji  0.4
17 Dec 2020 19:00 Lokia Fiji  0.4
17 Dec 2020 19:00 Naimasimasi Fiji  0.4
17 Dec 2020 19:00 Cautata Fiji  0.4
17 Dec 2020 19:00 Nasilai Fiji  0.4
17 Dec 2020 19:00 Dromuna Fiji  0.4
17 Dec 2020 19:00 Naruwai Fiji  0.4
15 Dec 2020 20:45 Natua Fiji  0.4
15 Dec 2020 20:45 Mbangata Fiji  0.4
15 Dec 2020 20:45 Savusavu Fiji  0.4
15 Dec 2020 20:45 Naindi Fiji  0.4
15 Dec 2020 20:45 Korosi Fiji  0.4
17 Dec 2020 19:00 Nabouwalu Fiji  0.4
17 Dec 2020 19:00 Thavanga Fiji  0.4
17 Dec 2020 19:00 Momi Fiji  0.4
17 Dec 2020 17:30 Nanduri Fiji  0.4
17 Dec 2020 17:30 Vatutandova Fiji  0.4
17 Dec 2020 17:30 Nasea Fiji  0.4
17 Dec 2020 19:00 Lomawal Fiji  0.4
17 Dec 2020 19:00 Mbatiri Fiji  0.4
16 Dec 2020 08:45 Lao Fiji  0.4
16 Dec 2020 08:45 Nailou Fiji  0.4
16 Dec 2020 08:45 Nawi Fiji  0.4
16 Dec 2020 08:45 Vunikura Fiji  0.4
16 Dec 2020 08:45 Napuka Fiji  0.4
17 Dec 2020 19:00 Nauouo Fiji  0.4
17 Dec 2020 19:00 Levuka Fiji  0.4
17 Dec 2020 19:15 Cuvu Fiji  0.4
17 Dec 2020 19:30 Nadi Fiji  0.4
17 Dec 2020 19:15 Sigatoka Fiji  0.4
17 Dec 2020 19:15 Laselase Fiji  0.4
17 Dec 2020 19:45 Korotasere Fiji  0.4
17 Dec 2020 19:45 Naweni Fiji  0.4
17 Dec 2020 19:45 Viani Fiji  0.4
17 Dec 2020 19:45 Ndrekeniwai Fiji  0.4
17 Dec 2020 19:45 Mbangasau Fiji  0.4
17 Dec 2020 19:15 Vatukarasa Fiji  0.3
17 Dec 2020 19:15 Korolevu Fiji  0.3
17 Dec 2020 19:15 Taunovo Fiji  0.3
17 Dec 2020 19:15 Bouwanga Fiji  0.3
17 Dec 2020 19:45 Vunisea Fiji  0.3
17 Dec 2020 19:45 Mburelevu Fiji  0.3
17 Dec 2020 19:45 Mokoisa Fiji  0.3
17 Dec 2020 19:45 Naikorokoro Fiji  0.3
17 Dec 2020 19:45 Namara Fiji  0.3
17 Dec 2020 19:45 Gasele Fiji  0.3
17 Dec 2020 19:45 Soso Fiji  0.3
17 Dec 2020 19:45 Kavala Fiji  0.3
17 Dec 2020 19:45 Kaduvu Fiji  0.3
17 Dec 2020 19:15 Korovisilou Fiji  0.3
17 Dec 2020 19:15 Galoa Fiji  0.3
17 Dec 2020 19:15 Yanutha Fiji  0.3
15 Dec 2020 06:00 Otumoetai New Zealand  0.3
15 Dec 2020 06:00 Mount Maunganui New Zealand  0.3
15 Dec 2020 06:00 Matapihi New Zealand  0.3
15 Dec 2020 06:00 Kairua New Zealand  0.3
15 Dec 2020 06:00 Papamoa New Zealand  0.3
17 Dec 2020 19:30 Matavuralevu Fiji  0.3
17 Dec 2020 19:30 Waisomo Fiji  0.3
17 Dec 2020 19:30 Dakuimbeqa Fiji  0.3
17 Dec 2020 19:30 Lalati Fiji  0.3
18 Dec 2020 00:00 Nasau Fiji  0.3
18 Dec 2020 00:00 Talaulia Fiji  0.3
18 Dec 2020 00:00 Nalotu Fiji  0.3
17 Dec 2020 19:30 Pacific Harbour Fiji  0.3
16 Dec 2020 18:15 Nakarambo Fiji  0.3
17 Dec 2020 19:15 Nukuvou Fiji  0.3
17 Dec 2020 19:15 Nabouwalu Fiji  0.3
17 Dec 2020 19:15 Vabea Fiji  0.3
17 Dec 2020 18:45 Navua Fiji  0.3
17 Dec 2020 18:45 Naitionitoni Fiji  0.3
17 Dec 2020 18:45 Mau Fiji  0.3
17 Dec 2020 18:45 Kalokolevu Fiji  0.3
17 Dec 2020 18:45 Makongai Fiji  0.3
15 Dec 2020 10:15 Ndaria Fiji  0.3
15 Dec 2020 10:15 Rave-rave Fiji  0.3
17 Dec 2020 18:45 Suva Fiji  0.3
17 Dec 2020 18:45 Tamavua Fiji  0.3
17 Dec 2020 18:45 Lauthala Bay Fiji  0.3
17 Dec 2020 18:45 Laucala Fiji  0.3
17 Dec 2020 20:15 Malake Fiji  0.3
17 Dec 2020 20:15 Biagunu Fiji  0.3
15 Dec 2020 03:45 Namboutini Fiji  0.3
17 Dec 2020 17:30 Vunivatu Fiji  0.3
17 Dec 2020 17:30 Navukembuli Fiji  0.3
17 Dec 2020 18:45 Waisa Fiji  0.3
15 Dec 2020 20:45 Ndawara Fiji  0.3
15 Dec 2020 19:45 Maketu New Zealand  0.2
15 Dec 2020 19:45 Maniatutu New Zealand  0.2
15 Dec 2020 19:45 Pukehina New Zealand  0.2
15 Dec 2020 19:45 Ohinepanea New Zealand  0.2
15 Dec 2020 19:45 Otamarakau New Zealand  0.2
15 Dec 2020 19:45 Pikowai New Zealand  0.2
17 Dec 2020 18:30 Naua Fiji  0.2
17 Dec 2020 18:30 Namukalau Fiji  0.2
16 Dec 2020 19:30 Opoutere New Zealand  0.2
16 Dec 2020 19:30 Whangamata New Zealand  0.2
15 Dec 2020 07:00 Te Puia New Zealand  0.2
15 Dec 2020 07:00 Te Puia Springs New Zealand  0.2
15 Dec 2020 07:00 Tokomaru Bay New Zealand  0.2
15 Dec 2020 07:00 Waipiro New Zealand  0.2
15 Dec 2020 07:00 Waipiro Bay New Zealand  0.2
15 Dec 2020 07:00 Whareponga New Zealand  0.2
15 Dec 2020 07:00 Tuparoa New Zealand  0.2
17 Dec 2020 18:45 Sawaieke Fiji  0.2
17 Dec 2020 18:45 Vione Fiji  0.2
16 Dec 2020 17:00 Tairua New Zealand  0.2
16 Dec 2020 17:00 Pauanui New Zealand  0.2
17 Dec 2020 18:45 Dalice Fiji  0.2
15 Dec 2020 05:45 Matata New Zealand  0.2
15 Dec 2020 05:45 Awakaponga New Zealand  0.2
15 Dec 2020 05:45 Thornton New Zealand  0.2
15 Dec 2020 05:45 Poroporo New Zealand  0.2
15 Dec 2020 05:45 Whakatane New Zealand  0.2
17 Dec 2020 18:45 Nakondu Fiji  0.2
17 Dec 2020 18:45 Nathamaki Fiji  0.2
17 Dec 2020 18:45 Nasau Fiji  0.2
16 Dec 2020 19:30 Vangai Fiji  0.2
15 Dec 2020 08:15 Waihi Beach New Zealand  0.2
15 Dec 2020 08:15 Athenree New Zealand  0.2
17 Dec 2020 18:30 Tawake Fiji  0.2
17 Dec 2020 19:00 Vandravandra Fiji  0.2
16 Dec 2020 20:00 Sumi Fiji  0.2
16 Dec 2020 20:00 Elsee Fiji  0.2
17 Dec 2020 18:30 Nukusa Fiji  0.2
17 Dec 2020 18:15 Nambouono Fiji  0.2
17 Dec 2020 18:45 Navakawau Fiji  0.2
17 Dec 2020 18:45 Korovou Fiji  0.2
16 Dec 2020 19:00 Keteira Fiji  0.2
16 Dec 2020 19:00 Andako Fiji  0.1
15 Dec 2020 11:15 Lakina Tuvalu  0.1
15 Dec 2020 11:15 Tonga Tuvalu  0.1
15 Dec 2020 11:00 Vaitupu Tuvalu  0.1
16 Dec 2020 04:15 Ohope Beach New Zealand  0.1
15 Dec 2020 18:45 Port Awanui New Zealand  0.1
15 Dec 2020 18:45 Rangitukia New Zealand  0.1
16 Dec 2020 15:45 Hicks Bay New Zealand  0.1
16 Dec 2020 15:45 Te Araroa New Zealand  0.1
16 Dec 2020 15:45 Horoera New Zealand  0.1
16 Dec 2020 15:45 East Cape New Zealand  0.1
16 Dec 2020 04:30 Waiotahi New Zealand  0.1
17 Dec 2020 12:45 Opotiki New Zealand  0.1
17 Dec 2020 12:45 Lower Waiawa New Zealand  0.1
17 Dec 2020 12:45 Torere New Zealand  0.1
17 Dec 2020 12:45 Houpoto New Zealand  0.1